The SVI-DSC provides a carrier grade Diameter signalling product delivering any combination of routing (DRA), interworking (IWF) and network edge (DEA) functionality.

Diameter Signalling Control

The increasing rollout of 4G LTE, IoT, VoWiFI, VoLTE and VoIP networks is seeing a rise in the volume of Diameter signalling on networks worldwide.

The SVI-DSC provides a comprehensive signalling solution to manage and secure Diameter networks while at the same time insuring backward compatability with legacy networks..



  • Delivers comprehensive Diameter traffic management with carrier grade Diameter Routing Agent (DRA)
  • Enables robust network edge security with full Diameter Edge Agent (DEA) support
  • Guarantees full backward compatibility to legacy networks with interworking function (IWF) support
  • Combat fraud with integrated Fraud Prevention Gateway
  • Enables seamless 3G - 4G Roaming
  • Provides WiFi offload for mobile subscribers

SVI-DSC Components


Scalable centralised routing of messages in a multivendor, multi node environment in a service providers IMS and LTE core.


Providing secure exchange of authentication, authorisation and subscriber policy across LTE networks.


Insures operators 4G Diameter networks can interconnect to legacy 2G/3G networks, equipment and signalling standards.

  • COTS Commercial Off The Shelf
    Supplied on standard Dell servers optionally with dedicated E1/T1/STM-1 support.

  • Virtual Deployment
    Virtual Machine deployed on industry standard servers in a data centre environment using a hypervisor, i.e. VMware.

  • Cloud Deployment
    Delivered as a Virtual Network Function (VNF) in AWS or OpenStack cloud infrastructure.

Modular Design

The SVI Diameter Signalling Controller’s modular design enables it to be deployed as an integrated product with Squire Technologies SS7 Signalling Transfer Point, Session Border Controller and SMSC Short Message Service Centre products.


  • STP | Signalling Transfer Point
    Our flagship SS7 STP provides seamless
    Diameter to SS7 integration.
    Find out more >

  • SBC | Session Border Controller
    Integration with our SVI-SBC provides Diameter,
    SIP and VoLTE support.
    Find out more >

  • SMSC | Short Message Service Centre
    Integration with our SMSC product providing
    Diameter billing support.
    Find out more >

Application Development

  • SVI-TAS | Telephony Application Server
    Extended application development on top of SVI-DSC product using the Python based (SVI-TAS) Telephony Application Server.

  • API
    Enables operators to interface to USSD, RADIUS, JSON, SQL, XML, SOAP, proprietary API’s etc.

The SVI-TAS operates over clearly defined API's that present an abstracted version of the underlying Diameter, SIP, CAMEL, MAP etc signalling. It can be driven by either our python based client (SVI-TAC), or by operators 3rd party applications.

The SVI-TAS provides an extremely flexible platform on which operators can define, configure and launch new services.


Find out what our customers
say about us...


Read our latest whitepaper on solving the 4G LTE mobile roaming puzzle

Download our SVI-DSC Diameter Signalling Controller Presentation

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